Re: strange behavior of let in ghci

On Thu, Jan 19, 2012 at 10:55 PM, Kazu Yamamoto wrote:

Hello,

I met strange behavior of let in ghci 7.0.4. The following works well.

You're running into the monomorphism restriction: http://www.haskell.org/haskellwiki/Monomorphism_restriction

...

let chooseMax = maximumBy compFst

If you re-define this to be:

let chooseMax x = maximumBy compFst x

you'll get around it in the easiest way. You can also turn off the restriction at the command-line with the argument '-XNoMonomorphismRestriction', I think. Antoine